Transistor matching circuit, revisited

[The Old Crow]

  Thinking it might be wise to correct the omission in the Moog service
manual transistor maching test circuit, I added the missing resistor to
the PNP side and posted the image here:

  http://www.oldcrows.net/~oldcrow/synth/matching.gif

  I'll put a postscript file of simple PCB artwork I made shortly.  Uses a
1458 and has both NPN and PNP 'sides'.

  (Side note: the 2N3906s I tested are pretty good these days; the first 5
matched to 2mV out of the bin, *and* had Hfe between 81 and 85).

Crow

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